Odd that you say you "reinstalled" it. The version I downloaded doesn't install. It's a copy of an install. You simply download it and run Wow.exe
As such you can run it from a flash drive - it's portable.
My point... you can't reinstall something that never was installed.

When it comes to Windows, I recommend keeping games in a separate folder, like "Games" or something else that's not located inside system folders like "Program Files". Because as mentioned, tools like the one that adds large memory awareness to the 32-bit wotlk exe file won't be able to write to the "Program Files" folder at all, because Windows simply won't allow them to. This has caused a lot of problems with a lot of games for people, and in some cases games are unable to even save games or settings. The solution ofc is to install (or keep, let's not get stuck on definitions at this point, hehe) the games in a folder Windows doesn't control.

Furthermore, even with the large memory awareness patch, you can run out of memory inside Dalaran in WotLK, especially if you're using the client version with the updated character models. I believe that it crashes right before 2GB memory usage without the patch, and a little before 4GB with the patch, regardless of how much physical ram you actually have installed. And with the new character models you'll hit that in Dalaran in a heartbeat! The WotLK client is a fairly buggy one as it doesn't appear to have any smart memory magement. It simply crashes. Should also be noted that this is a weakness from Blizzard, and nothing anybody at warmane can fix. It's just a problem we'll have to work around.

My solution was to both use the large memory awareness patch, and disable all new character models. Only patch I have is some pretty water patch, because I totally hate the old water. ;)

Oh, and it also helps to do a /reload before entering Dalaran, after leaving it, and every now and then while being there too. I think that flushes the ram. Oh, and reduce view distance too! The farther you see, the more is cached up, and the faster you crash.

Good answer, Norberg. Can you tell me the name of your water patch? LK water is horrific.

For the record, I use the WoD model client and when I first got to Dalaran it was insta-crash for me repeatedly until I started using the LAA prog.
I mention this because I have view distance (and all other graphics settings) just absolutely maxed. 2560x1080 resolution pushed by a GTX 1070.
Dalaran will drag me down to mid 40's in the framerate at peak times but I haven't crashed since I started using the large memory awareness patch.
There must be something else at play here.